/*
 * @(#)$Id$
 *
 * Copyright 2006-2008 Makoto YUI
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * Contributors:
 *     Makoto YUI - initial implementation
 */
package gridool.routing.selector;

import gridool.GridConfiguration;
import gridool.GridNode;
import gridool.routing.GridNodeSelector;

import java.util.List;

/**
 * 
 * <DIV lang="en"></DIV>
 * <DIV lang="ja"></DIV>
 * 
 * @author Makoto YUI (yuin405@gmail.com)
 */
public final class PrimaryNodeSelector implements GridNodeSelector {

    public PrimaryNodeSelector() {}

    public GridNode selectNode(List<GridNode> nodeList, GridConfiguration config) {
        final int size = nodeList.size();
        if(size == 0) {
            return null;
        } else {
            return nodeList.get(0);
        }
    }

}
